MV8870 Ver la hoja de datos (PDF) - Unspecified
Número de pieza
componentes Descripción
Fabricante
MV8870 Datasheet PDF : 13 Pages
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MV8870/MV8870-1
fLOW
fHIGH
DIGIT TOE
Q4
697 1209 1
H
0
697 1336 2
H
0
697 1477 3
H
0
770 1209 4
H
0
770 1336 5
H
0
770 1477 6
H
0
852 1209 7
H
0
852 1336 8
H
1
852 1477 9
H
1
941 1209 0
H
1
941 1336 *
H
1
941 1477 #
H
i
697 1633 A
H
1
770 1633 B
H
1
852 1633 C
H
1
941 1633 D
H
0
-
-
Any
L
Z
SELECT = L
Q3
Q2
Q1
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
l
l
1
0
0
0
Z
Z
Z
SELECT = H
Q4
Q3
Q2
Q1
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
0
0
0
0
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
Z
Z
Z
Z
Figure 6: Functional decode table
DTMF
OUTPUT
C1
R1
R1, R2 = 100kΩ±1%
R3 = 300kΩ±1%
C1, C2 = 0.1µF±5%
X = 3.579545MHz±0.1%
R2
X
MV8870/
MV8870-1
1
IN+
18
VDD
2
IN-
17
St/GT
3
GS
16
ESt
4
VREF
15
StD
5
SEL
14
Q4
6
PD
13
Q3
7
OSC1
12
Q2
8
OSC2
11
Q1
9 VSS
10
TOE
VDD
C2
R3
} DECODED
OUTPUT
Figure 7: Simple application circuit; single ended input
18
VDD
MV8870/
17
St/GT
MV8870-1
16
ESt
15
StD
VDD
C
R1
R2
tGTA = R1C In {VDD ÷ VTSt}
tGTP = RPC In {VDD ÷ [VDD - VTSt]}
RP = R1R2 ÷ {R1 + R2}
Figure 8a: Guard time adjustment (tGTP < tGTA)
4
18
VDD
MV8870/
17
St/GT
MV8870-1
16
ESt
15
StD
VDD
C
R1
R2
tGTA = RPC In {VDD ÷ VTSt}
tGTP = R1C In {VDD ÷ [VDD - VTSt]}
RP = R1R2 ÷ {R1 + R2}
Figure 8b: Guard time adjustment (tGTP > tGTA)
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